I have an IVR script for recording the caller to leave a voice message to agent,
and the agent is able to listen the voice message.
The script is 100% working during the development environment (that is an isolated network)
When the script moves to another production environment
The outside caller (e.g. my mobile phone) is able to do the same thing,
However, if the caller is made from internet network, seems the "recording" function not working
are there any possible reason may cause the above problem?